Briefing for Heat, Severe Storm, and Flash Flood Risks through Thursday

Dangerously hot and humid conditions are expected through Wednesday. There is also a threat of isolated severe thunderstorms on Wednesday. Flash flooding from locally heavy rainfall is possible on Thursday. See this briefing for details on these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Mostly Cloudy

92°F

33°C

Humidity	54%
Wind Speed	SW 8 mph
Barometer	30.02 in (1016.5 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	29 Jul 10:54 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles SW Williamstown NJ

Heat Advisory July 29, 11:16am until July 30, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory July 29, 11:16am until July 30, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
Today
High: 97 °F
Hot
Tonight
Low: 74 °F
Mostly Clear
Wednesday
High: 97 °F
Hot
Wednesday Night
Low: 74 °F
Slight Chance
T-storms
Thursday
High: 88 °F
Chance
Showers then
Heavy Rain
Thursday Night
Low: 68 °F
Heavy Rain
Friday
High: 75 °F
Showers then
Chance
Showers
Friday Night
Low: 62 °F
Mostly Cloudy

Detailed Forecast

Today

Sunny and hot, with a high near 97. Heat index values as high as 104. Calm wind becoming west around 5 mph in the afternoon.

Tonight

Mostly clear, with a low around 74. Southwest wind around 5 mph becoming calm.

Wednesday

Sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon.

Wednesday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 20%.

Thursday

A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 88. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 68. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Friday

Showers, mainly before 8am. High near 75. Chance of precipitation is 80%.

Friday Night

Mostly cloudy, with a low around 62.

Saturday

Sunny, with a high near 80.

Saturday Night

Mostly clear, with a low around 59.

Sunday

Sunny, with a high near 83.

Sunday Night

Partly cloudy, with a low around 61.